I have, I've also seen the good prices and reviews on them. They will probably be my fallback if I can't find the Manafont style.
Those FT reflectors that fit the XM-L have a flat ring at the bottom of the reflector, and on the emitter side have a wide ring around the opening for the LED. I got a similar reflector from IS. With my rusty soldering skills, the wide ring can short the solder blobs before being fully screwed down. The MF reflector tapers fully down to the LED which I prefer, and has much more clearance on the emitter side.
I fixed that IS reflector with a dremel, but it still has that ugly ring and I'm not that fond of the dremel.
Looks like I will be using the fasttech drop-ins after all. I see a lot of dremeling in my future. By the time I'm finished my rusty soldering skills should be a little more polished.
Unless someone has another suggestion I'll be ordering 6 of the $1.99 Fasttech Orange Peel empties when I get off work tonight.